2000 Gauss 7 Problem 13

Karl had his salary reduced by 10%. He was later promoted and his salary was increased by 10%. If his original salary was \$20\,000, what is his present salary?

\textbf{(A)}\ \$16\,200\quad \textbf{(B)}\ \$19\,800\quad \textbf{(C)}\ \$20\,000\quad \textbf{(D)}\ \$20\,500\quad \textbf{(E)}\ \$24\,000

If there are no answer choices shown, enter a numerical answer.

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